Method for transmitting and receiving signal in a wireless local area network and device for same

Abstract

The present specification proposes a method for a station to transmit and receive a signal in a wireless LAN (WLAN) system and an apparatus therefor. More specifically, when the station transmits and receives a signal via a plurality of channels, the present invention proposes a method of performing beamforming training on the plurality of channels, a method of transmitting and receiving a signal based on the beamforming training and an apparatus therefor.

What is claimed is: 
     
       1. A method of transmitting, by a first station (STA), a signal to a second STA through a plurality of channels in a wireless LAN (WLAN) system, the method comprising:
 transmitting a beam refinement protocol (BRP) packet to the second STA, wherein the BRP packet is generated based on a lowest modulation and coding scheme (MCS) to perform a beamforming training procedure on the plurality of channels, wherein the plurality of channels is generated based on a channel bonding scheme or a channel aggregation scheme; and 
 transmitting the signal to the second STA through the plurality of channels based on the beamforming training procedure, 
 wherein the BRP packet is configured in an order of a Legacy Short Training Field (L-STF) field, a Legacy Channel Estimation (L-CE) field, a Legacy Header (L-Header) field, an Enhanced Directional Multi Gigabit Header A (EDMG Header A) field, a Beam Refinement Protocol (BRP) data frame, and a Training (TRN) field, 
 wherein the BRP data frame is duplicated for the plurality of channels, 
 wherein the TRN field is transmitted through bonded channels based on the channel bonding scheme according to information in the EDMG Header A field. 
 
     
     
       2. The method of  claim 1 , wherein when the BRP packet is transmitted through the plurality of channels based on the channel bonding scheme, the plurality of channels comprises a channel bonding of 2 to 4 channels. 
     
     
       3. The method of  claim 1 , wherein when the BRP packet is transmitted through the plurality of channels based on the channel aggregation scheme, the plurality of channels comprises a channel aggregation of 2 channels or a channel aggregation of 4 channels. 
     
     
       4. The method of  claim 1 , wherein the BRP packet does not comprise an EDMG-STF field, an EDMG-CE field, and an EDMG header-B field. 
     
     
       5. The method of  claim 1 , wherein the lowest MCS corresponds to an MCS level 0. 
     
     
       6. A method of receiving, by a second station (STA), a signal from a first STA through a plurality of channels in a wireless LAN (WLAN) system, the method comprising:
 receiving a beam refinement protocol (BRP) packet from the first STA, wherein the BRP packet is generated based on a lowest modulation and coding scheme (MCS) to perform a beamforming training procedure on the plurality of channels, wherein the plurality of channels is generated based on a channel bonding scheme or a channel aggregation scheme; and 
 receiving the signal from the first STA through the plurality of channels based on the beamforming training procedure, 
 wherein the BRP packet is configured in an order of a Legacy Short Training Field (L-STF) field, a Legacy Channel Estimation (L-CE) field, a Legacy Header (L-Header) field, an Enhanced Directional Multi Gigabit Header A (EDMG Header A) field, a Beam Refinement Protocol (BRP) data frame, and a Training (TRN) field, 
 wherein the BRP data frame is duplicated for the plurality of channels, 
 wherein the TRN field is transmitted through bonded channels based on the channel bonding scheme. 
 
     
     
       7. The method of  claim 6 , wherein when the BRP packet is transmitted through the plurality of channels based on the channel bonding scheme, the plurality of channels comprises a channel bonding of 2 to 4 channels. 
     
     
       8. The method of  claim 6 , wherein when the BRP packet is transmitted through the plurality of channels based on the channel aggregation scheme, the plurality of channels comprises a channel aggregation of 2 channels or a channel aggregation of 4 channels. 
     
     
       9. The method of  claim 6 , wherein the BRP packet does not comprise an EDMG-STF field, an EDMG-CE field, and an EDMG header-B field. 
     
     
       10. The method of  claim 6 , wherein the lowest MCS corresponds to an MCS level 0. 
     
     
       11. A first station transmitting a signal via a plurality of channels in a wireless LAN (WLAN) system, the first station comprising:
 a transceiver; and 
 a processor operatively coupled to the transceiver, 
 wherein the processor is configured to: 
 control the transceiver to transmit a beam refinement protocol (BRP) packet to a second station, wherein the BRP packet is generated based on a lowest modulation and coding scheme (MCS) to perform a beamforming training procedure on the plurality of channels, wherein the plurality of channels is generated based on a channel bonding scheme or a channel aggregation scheme, and 
 control the transceiver to transmit the signal to the second station through the plurality of channels based on the beamforming training procedure, 
 wherein the BRP packet is configured in an order of a Legacy Short Training Field (L-STF) field, a Legacy Channel Estimation (L-CE) field, a Legacy Header (L-Header) field, an Enhanced Directional Multi Gigabit Header A (EDMG Header A) field, a Beam Refinement Protocol (BRP) data frame, and a Training (TRN) field, 
 wherein the BRP data frame is duplicated for the plurality of channels, 
 wherein the TRN field is transmitted through bonded channels based on the channel bonding scheme according to information in the EDMG Header A field. 
 
     
     
       12. A second station receiving a signal via a plurality of channels in a wireless LAN (WLAN) system, the second station comprising:
 a transceiver; and 
 a processor operatively coupled to the transceiver, 
 wherein the processor is configured to 
 control the transceiver to receive a beam refinement protocol (BRP) packet from a first station, wherein the BRP packet is generated based on a lowest modulation and coding scheme (MCS) to perform a beamforming training procedure on the plurality of channels, wherein the plurality of channels is generated based on a channel bonding scheme or a channel aggregation scheme, and 
 control the transceiver to receive the signal from the first station through the plurality of channels based on the beamforming training procedure, 
 wherein the BRP packet is configured in an order of a Legacy Short Training Field (L-STF) field, a Legacy Channel Estimation (L-CE) field, a Legacy Header (L-Header) field, an Enhanced Directional Multi Gigabit Header A (EDMG Header A) field, a Beam Refinement Protocol (BRP) data frame, and a Training (TRN) field, 
 wherein the BRP data frame is duplicated for the plurality of channels, 
 wherein the TRN field is transmitted through bonded channels based on the channel bonding scheme according to information in the EDMG Header A field.